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Thread: Drivers side cold air, Passenger side HOT air

  1. #1
    TURBO2's Avatar
    TURBO2 is offline Cadillac Owners Fanatic
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    Drivers side cold air, Passenger side HOT air

    I have a 2005 deville and no matter what settings I choose I end up with hot air coming out the passenger side vents. I have tried turning the passenger side to full colder and off and it makes no difference. I read for earlier years it might be the actuator valve. Is it the same for 2005 Cadillacs or is it something else?
    Also, if it is the valve where is it located?
    Thanks in advance,
    Curt


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  3. #2
    Submariner409's Avatar
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    Re: Drivers side cold air, Passenger side HOT air

    If the 2005 still has built-in diagnostic code capability, use the sticky post ^^^ "How to pull codes" to find out if there's a stuck HVAC air door or actuator fault. If your car does not have the onboard feature, any large parts chain store can pull codes for you.

    My guess is either a bad diverter door actuator or a marginally undercharged HVAC system.

    Not "valves" - actual swing doors operated by stepper actuator motors.

  4. #3
    TURBO2's Avatar
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    Re: Drivers side cold air, Passenger side HOT air

    I came up with a BO419 (air mix door #2 range error) & BO429 (Temp control #3 rear circuit range/performance)

    I also found U1000 ( Class 2 Communication malfunction)

  5. #4
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    Re: Drivers side cold air, Passenger side HOT air

    Quote Originally Posted by TURBO2 View Post
    I came up with a BO419 (air mix door #2 range error) & BO429 (Temp control #3 rear circuit range/performance)

    I also found U1000 ( Class 2 Communication malfunction)
    ----------------------------------
    I came up with a BO419 (air mix door #2 range error)
    the #2 actuator IS the one
    that controls the temperature of the passengers side -
    it needs to be replaced -

    do a search for "replace mix door actuator" -
    or "replace blend door actuator" -

    there are 3 of them - under the dash -
    remove the glove box - and the hush panels to gain access -

    BO429 (Temp control #3 rear circuit range/performance)
    a very common code relating to the rear seat temperature controller -
    basically - it is saying the rear seat temperature setting
    doesn't match the controller setting -

    just turn off the rear seat control off - and ignore it -

    I also found U1000 -
    also VERY VERY common -
    "U" codes are data line - communication codes -
    they come and go regularly -
    they can just be ignored -

  6. #5
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    Re: Drivers side cold air, Passenger side HOT air

    I did a search and all that came up was a link to this site for the older Eldorados.

  7. #6
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    Re: Drivers side cold air, Passenger side HOT air

    Number 18

    http://www.gmpartsgiant.com/Page_Pro...053&SortKey=12


    Wider view (view A lower left)


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    Re: Drivers side cold air, Passenger side HOT air

    How difficult (and how much time) is it to do this job? I was going to replace all of the actuators so this wouldn't happen again to another one until I found out that they are $105.00 - $150.00 each. Also the dealer was saying it could take up to 8 hours to replace them! I didn't think that sounded right but who knows. The dealer said to replace all of them I might be looking at up to $1200.00 for the job. So now I am back to just doing the defective one and hoping I can do it myself as it will be hard for me to even come up with the money for the actuator.

  9. #8
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    Re: Drivers side cold air, Passenger side HOT air

    If it ain't broke, don't fix it.

    Never had to do one (knock on wood).........................yet, so I am not sure how long it takes. Someone who has may chime in. There is probably a tutorial or two in the Tech Tips section.

  10. #9
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    Re: Drivers side cold air, Passenger side HOT air

    Anyone have any experience doing this job?

  11. #10
    basscatt's Avatar
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    Re: Drivers side cold air, Passenger side HOT air

    Quote Originally Posted by TURBO2 View Post
    Anyone have any experience doing this job?
    ---------------
    it's been discussed a million times here and in TechTips -
    search for either MIX DOOR ACTUATOR - or BLEND DOOR ACTUATOR -
    there are 3 of them -
    #1 is the left - or driver side -
    #2 is right - or passenger side -
    #3 is for the rear seat -

    the part should be around $50 -
    the amount of time it takes depends on your skill level -
    and whether or not you have the Factory Service Manual - (or AllData on-line)


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